fix paths for jinja2 so they work in installed ipython instances

IPython/frontend/html/notebook/handlers.py

@@ -213,7 +213,7 @@ class ProjectDashboardHandler(AuthenticatedHandler):
     def get(self):
         nbm = self.application.notebook_manager
         project = nbm.notebook_dir
-        env = Environment(loader=FileSystemLoader(os.path.join(os.path.abspath("."), "IPython/frontend/html/notebook/templates")))
+        env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")))
         nb = env.get_template('projectdashboard.html')
         self.write( nb.render(project=project,
             base_project_url=self.application.ipython_app.base_project_url,
@@ -226,7 +226,7 @@ class ProjectDashboardHandler(AuthenticatedHandler):
 class LoginHandler(AuthenticatedHandler):
 
     def _render(self, message=None):
-        env = Environment(loader=FileSystemLoader(os.path.join(os.path.abspath("."), "IPython/frontend/html/notebook/templates")))
+        env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")))
         nb = env.get_template('login.html')
         self.write( nb.render(
                 next=self.get_argument('next', default=self.application.ipython_app.base_project_url),
@@ -265,7 +265,7 @@ class LogoutHandler(AuthenticatedHandler):
             message = {'warning': 'Cannot log out.  Notebook authentication '
                        'is disabled.'}
 
-        env = Environment(loader=FileSystemLoader(os.path.join(os.path.abspath("."), "IPython/frontend/html/notebook/templates")))
+        env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")))
         nb = env.get_template('logout.html')
         self.write( nb.render(        
                     read_only=self.read_only,
@@ -292,7 +292,8 @@ class NamedNotebookHandler(AuthenticatedHandler):
         project = nbm.notebook_dir
         if not nbm.notebook_exists(notebook_id):
             raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
-        env = Environment(loader=FileSystemLoader(os.path.join(os.path.abspath("."), "IPython/frontend/html/notebook/templates")))
+        
+        env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")))
         nb = env.get_template('notebook/notebook.html')
         self.write( nb.render(project=project,
             notebook_id=notebook_id,
@@ -314,7 +315,7 @@ class PrintNotebookHandler(AuthenticatedHandler):
         if not nbm.notebook_exists(notebook_id):
             raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
         
-        env = Environment(loader=FileSystemLoader(os.path.join(os.path.abspath("."), "IPython/frontend/html/notebook/templates")))
+        env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")))
         nb = env.get_template('printnotebook.html')
         self.write( nb.render(
              project=project,